Each​ month, a shopkeeper spends 6 x plus 13 dollars on rent and electricity. If she spends 3 x minus 7 dollars on​ rent, how much does she spend on​ electricity? Use pencil and paper. For which​ value(s) of x is the amount the shopkeeper spends on electricity less than​ $100? Explain how you found the​ value(s).

To find the extreme values of a function f(x.y) on a curve x-x(t), y y(t), treat f as a function of the single variable t and use the chain rule to find where df/dt is zero. in any other single-variable case, the extreme values of f are then found among the values at the critical points (points where df/dt is zero or fails to exist), and endpoints of the parameter domain. find the absolute maximum and minimum values of the following function on the given curves. use the parametric equations x=2cos t, y 2 sin t functions: curves: i) the semicircle x4,y20 i) the quarter circle x2+y-4, x20, y20 b, g(x,y)=xy

On saturday a souvenir shop had 125 customers.sixty four percent of the costumers paid with a credit card. how many costumers paid with cash?

Anyone know these questions? i need ,.